Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fdba1983c810ddbeb5236dae82fd38e366d17584391740c757acdd9c23deac5' 
  AND token = '+aD111BS18p7ZWDrMo5IWkZIjHEdVxLtFBhPDyUSmqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}